Thanks amriju for the information. Below are the list of general documents for H1b stamping for future reference to anyone who is going for stamping.

1. I-797 Approval Original Document
2. Current and Old Passport Original
3. LCA
4. I 129 Photocopy
5. Vendor Letter
6. Client Letter
7. Contract Letter between Employer and Vendor
8. Copy of W2s
9. Copy of Federal/ State Tax
10. Pay Stub for last 6 Months
11. Employment Reference Letter
12. Experience Letter from Previous Employer
13. Bank Statement for 6 Months
14. Degree Certificate
15. SSN
16. Resume
17. DS-160 Confirmation
18. Appointment Confirmation with Consular Section
Additional Documents (If needed only)
1. Client ID Card
2. Time sheets
3. Client Location Photos (Optional)
4. State ID/ Driver License